I've already mentioned a study that found a link between traumatic brain injury and insomnia. New research now adds even more weight to this claim.
The new study, published in The Journal of Neuroscience, used CT scans to map the exact location of brain damage in 192 brain injured Vietnam veterans. The researchers found a strong correlation between moderate to severe insomnia and damage to the left dorsomedial prefrontal cortex (a specific region on one side of the brain).
It's thought that sleep signals pass through the left dorsomedial prefrontal cortex so when this area is damaged, sleep signals are disrupted which can lead to insomnia.
Perhaps this should be taken as further evidence that insomnia isn't always a psychological condition. This isn't the first study I've come across that found a link between the physiological attributes of the brain and insomnia.
Source: The Journal of Neuroscience
Last updated: July 1, 2013